Shimano dura ace di2 r9170 2x11 disc brake leverthe 9170 shifters feature an ideal ergonomic shape that is comfortable in the hand and similar in size to mechanical braking versions of the shifter despite the hydraulic internals housed in the hoods they have been updated to be more comfortable more precise and more adaptable than previous editions the shift paddles now feature a more defined click for confidence in shifting and to prevent mis shifts also the shift buttons have been extended